28775053816 has 8 divisors (see below), whose sum is σ = 53953225920. Its totient is φ = 14387526904.

The previous prime is 28775053781. The next prime is 28775053817. The reversal of 28775053816 is 61835057782.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×28775053816² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28775053817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1798440856 + ... + 1798440871.

It is an arithmetic number, because the mean of its divisors is an integer number (6744153240).

Almost surely, 2^28775053816 is an apocalyptic number.

It is an amenable number.

28775053816 is a deficient number, since it is larger than the sum of its proper divisors (25178172104).

28775053816 is a wasteful number, since it uses less digits than its factorization.

28775053816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3596881733 (or 3596881729 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 52.

The spelling of 28775053816 in words is "twenty-eight billion, seven hundred seventy-five million, fifty-three thousand, eight hundred sixteen".